Water Supply Engineering

1. 135 litres of water per person per day, is provided in

1. Nurses homes
2. Hostels
3. Residential schools
4. All the above

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2. 45 litres of water per person per day, is provided in

1. Office buildings
2. Hotels
3. Hostels
4. Nurse's homes

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3. A centrifugal pump is required to be primed before starting if it is located

1. At higher level than water level of reservoir
2. At lower level than water level of reservoir
3. Both (a) and (b)
4. Neither (a) nor (b)

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4. A circular gravity aqueduct is not generally preferred to because of

1. Its maximum hydraulic mean depth
2. Maximum area per unit of wetted perimeter
3. Minimum cost of construction
4. Its proper support on the ground

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5. A city supply includes

1. Domestic water demand
2. Industrial and commercial water demands
3. Demand for public uses and fire
4. All the above

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6. A high velocity of wash water is required for

1. Rapid gravity filter with strainers
2. Rapid gravity filter without strainers
3. Slow sand filter with strainers
4. Slow sand filter without strainers

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7. A pressure conduit carrying water beneath a stream or a canal, is known as

1. Sag
2. Depressed pipe
3. Inverted syphon
4. All the above

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8. A pressure conduit laid underground, may not be subjected to

1. Internal pressure of water
2. Pressure due to external load
3. Longitudinal temperature stress
4. Longitudinal stresses due to unbalanced pressure to bends

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9. A slow sand filter is cleaned if its filter head is higher than

1. 10 cm to 20 cm
2. 20 cm to 40 cm
3. 40 cm to 70 cm
4. 70 cm to 120 cm

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10. A strainer type well sunk through three previous layers intervened by three impervious aquicludes, draws water from

1. Top most pervious layer
2. Central pervious layer
3. Lowest pervious layer
4. All the pervious layers

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